mikl
We’ve recently started seeing our CI jobs failing due to mix deps.get hanging. It stalls for an hour, then the CI job gets a timeout, our script looks like this:
$ mix local.hex --force --if-missing
$ mix local.rebar --force --if-missing
$ mix hex.repo add oban https://getoban.pro/repo --fetch-public-key ${OBAN_KEY_FINGERPRINT} --auth-key ${OBAN_LICENSE_KEY}
$ mix deps.get
This is with Gitlab CI, using the hexpm/elixir:1.17.3-erlang-26.2.5.4-debian-bookworm-20241016-slim docker image.
Is there any way to see where it is getting stuck? mix help deps.get does not list any verbose or debugging flags.
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jeroenbourgois
Can you curl the package from within CI? Maybe try that just to verify the credentials in the url are correct? Something like:
curl -I https://getoban.pro/repo --fetch-public-key ${OBAN_KEY_FINGERPRINT} --auth-key ${OBAN_LICENSE_KEY}mikl
It works about half the time, so the credentials must be right. And if they were wrong, Hex would throw an error message, not just hanging.
sorentwo
Authenticating and fetching from the
getoban.prorepo shouldn’t time out. However, we’ve heard about network trouble from CI instances in the past.Try switching to the newer, globally distributed repo instead:
https://repo.oban.pro. That will be served closer to your CI servers and should have better connectivity guarantees.mikl
I’m far from certain that it’s the Oban repo causing
mix deps.getto hang, changing the URL didn’t help at least. Wish I could find a way to see what is causing it to hang.axelson
What does
MIX_DEBUG=true mix deps.getshow? It should print output kind of like:Another thing you could check is
MIX_PROFILE=deps.get mix deps.get. Although I’m not sure if that’ll help ifmix deps.gethangs forever.Example output
It was a little tricky to find, but here is where that is documented: Mix — Mix v1.20.2
It was tricky because as far as I can tell:
mix helpwon’t print that out as help textasdf)MIX_DEBUGdoesn’t yield any results because it actually seems to search for all mentions ofmixordebugand there are a lot of thoseI found the docs because I already knew there was a
MIX_DEBUGenvironment variable, so I downloaded Elixir’s source code and searched viagit grep.One last thing. If you have the dependencies, i.e. you’ve cached the
deps/,~/.mix,~/.hexthen you can addHEX_OFFLINE=trueto skip contracting hex.pm (that’s documented at mix hex.config — Hex v2.5.0)